Analogue Addressable Duct

Product Overview

The InnovairFlex DNR-AUS Intelligent Photoelectric Duct Smoke Detector features a pivoting housing that fits both square and rectangular footprints, capable of mounting to a round or rectangular duct. These units sense smoke in the most challenging conditions, operating in airflow speeds of 0.5 to 20 meters per second, temperatures of -20 °C to 70 °C and a relative humidity range of 0 to 95 percent, non-condensing. An improved cover design isolates the sensor head from the Low Flow feature for simple maintenance. A Cover Tamper feature provides a fault signal if the sensor cover is removed or improperly installed. The InnovairFlex housing has a 20 mm conduit knockout and ample space for wiring. The InnovairFlex Duct Smoke Detector can be customized to meet local requirements and specifications without additional wiring. The product line utilises a new sampling tube range, but remains compatible with all previous Innovair models, including remote test accessories.


  • Utilises standard plug-in conventional photo-electronic smoke detector – supplied separately
  • Integrated Low-Flow technology
  • Air Velocity rating from 0.5 m/s to 20 m/sec
  • Suitable for very early warning fire detection (replacing DNRHS), when fitted with a 7351-IV detector
  • Versatile mounting options: square or rectangular configuration
  • Broad ranges for operating temperature (-20 °C to 70 °C) and humidity (0% to 95% non-condensing)
  • Patented sampling tube installs from front or rear of the detector with no tools required
  • Cover Tamper signal
  • Large wiring space with 3 x 20 mm conduit knockouts
  • Remote Test ability, with external power and RTS451KEY
  • Improved LED status
  • Powered from the analogue addressable loop

Click here to download the white paper: Duct Application Smoke Detectors


Product Code Description
DNR-AUS AA Duct Housing, no Relay, no Detector, no Tube
AADUCTKIT AA Duct Kit (DNR+2251BPI, no Tube, no Relay)